Question

What do we shield the machinery of a wrist watch with to make it anti magnetic ?

• A. Plastic sheets
• B. A metal of high conductivity
• C. A magnetic substance of low permeability
• D. A magnetic substance of high permeability

Answer 1

The correct option is D A magnetic substance of high permeability

Wrist watches are made anti magnetic by shielding their machinery with a magnetic substance of high permeability. Since these type of material has a high response to the magnetic field and restrict the field to penetrate through them. They serve as a good magnetic shielding.